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INSTALLER'S INSTRUCTION & USER'S MANUAL
Model Numbers:
VRFI-07EC4-D2B(55)5
VRFI-09EC4-D2B(55)5
VRFI-12EC4-D2B(55)5
VRFI-15EC4-D2B(55)5
VRFI-18EC4-D2B(55)5
VRFI-24EC4-D2B(55)5
VRFI-30EC4-D2B(55)5
VRFI-36EC4-D2B(55)5
VRFI-42EC4-D2B(55)5
VRFI-48EC4-D2B(55)5
Thank you for choosing this YMGI product. Please read the owner's manual carefully before installation and operation and retain for your
records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to download
a current electronic version.
This product is designed and manufactured to be free from any defects in material and workmanship during normal use and
maintenance. Installation, operation, maintenance and repair must follow all standards and professional practices for regular cooling
and heating equipment, such as NEC, State, or Local Codes and all related documents/manuals provided by YMGI. Failure to follow
and adhere to all codes and documentation can cause damage to equipment, property even personal injury.
Installer: Currently licensed/certified HVAC technicians only. Must Read the manual and all provided documents prior to installation.
Complete and fill out all required information on the warranty registration card.
User: Retain this manual and all supplied documents for your records and future reference.
Servicer: Use this manual for information concerning servicing and maintenance of this product.
Only qualified technicians should install and service this equipment. The installation, startup, operation and servicing of this equipment
can be hazardous and requires a HVAC professional who has been trained, licensed and certified. Installations, adjustments or any
equipment alterations done by an unqualified person could result in serious injury and even death. When working on the equipm ent,
observe all precautions in the provided documents, on the tags, stickers, and labels that are attached to or placed on the equipment.
YMGI, Engineered Comfort Products for A Sustainable
and Efficient Green World!
Ceiling Cassette VRF Systems
VRF (55) EC
7k-48k, 18-23 SEER Cooling and Heat Pump
SAFETY WARNING
NOTICE
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Table of Contents
Related Manuals for YMGI VRFI-07EC4-D2B(55)5
Summary of Contents for YMGI VRFI-07EC4-D2B(55)5
- Page 1 VRFI-48EC4-D2B(55)5 Thank you for choosing this YMGI product. Please read the owner’s manual carefully before installation and operation and retain for your records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to download a current electronic version.
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Page 2: Table Of Contents
Limited Product Warranty ........................8 Limited Product Warranty Registration Card ..................10 Why Does YMGI Group Require Installation and Service to Be Performed 100% By Currently Licensed or Certified HVAC Technicians/Contractors ..........11 Suggestions to Aid You in Hiring an HVAC Contractor ................11 System Diagram ............................ -
Page 3: Introduction
Refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs), may affect the ozone layer. Not all refrigerants have the same potential impact on the environment. YMGI Group advocates for the responsible handling of all refrigerants including industry replacements for CFCs such as HCFCs and HFCs. - Page 4 This document and the information contained therein are the sole property of YMGI Group and shall not be used or reproduced in whole or in part, without the written permission of YMGI Group. YMGI Group reserves the right to revise this manual at any time and to make changes to its content without obligation to notify anyone about any modifications, revisions or changes.
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Page 5: Note From Ymgi - Must Read
YMGI Group is the MEDIA AUTHORITY: YMGI Group, located in O'Fallon, MO 63366 is the author of all media produced for its products and is the only party able to give any additional explanation for any data, definitions and or descriptions found within any of its media, including but not limited to YMGI product brochures, manuals, pamphlets, catalogs, and videos. - Page 6 In an effort to help protect our customers from possible faulty installations that can lead to premature unit failure, YMGI provides the above information for you and the technician. You can observe while your system is being installed, even though your observation is not a guarantee your system is being or has been installed properly and professionally.
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Page 7: Installing Technician/Contractor's Responsibilities
You will be solely responsible for the entire installation that you have been contracted. Make sure you have all the materials you need to properly, completely and correctly finish the installation. The YMGI units and accessories may be just a portion of what you will need for the project. When support issues arise, remember YMGI employees and YMGI distributors/sales, dealers and agents are not installers and may only provide suggestions. -
Page 8: Limited Product Warranty
Compressor: YMGI will warrant the compressor of an YMGI-validated and approved warranty filing, for a period of 7 years from the date of successful installation at its original installation location. Parts: YMGI will warrant parts of an YMGI-validated and approved warranty filing, for two years from the date of successful installation at original installation location. - Page 9 YMGI Technical support the exact part(s) needed to fix the problem(s). 2. YMGI will check the customer's warranty filing. There will be no charge for Parts with a validated and approved warranty. Any Parts that have not been validated and approved or have an invalid warranty filing resulting in an unapproved warranty request, will be charged accordingly.
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Page 10: Limited Product Warranty Registration Card
YMGI: Your Modern Green Idea YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 11: Why Does Ymgi Group Require Installation And Service To Be Performed 100% By Currently Licensed Or Certified Hvac Technicians/Contractors
Some contractors/technicians may not feel comfortable installing equipment that has been purchased by someone other than themselves. You can contact YMGI directly to check and see if there are contractors in your area who have installed our products or any similar products. - Page 12 YMGI Group recommends that only properly trained and authorized personnel be allowed to repair or service the unit. Improper repairs or servicing can result in electric shock or fire hazards. Please contact YMGI Group if you need help locating a qualified repair or service technician.
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Page 13: System Diagram
YMGI: Your Modern Green Idea SAMPLE DIAGRAM OF INSTALLED SYSTEM The refrigerant pipe, drain pipe and electrical wiring for this unit should be installed by a qualified HVAC professional only. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 14: Accessories
Pipe Insulation Insulates the liquid pipe Insulation Insulates the drain pipe Connects the gas pipe Flare Nut Flare Nut Connects the liquid pipe Service Valve Cap Protects service port YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 15: Ceiling Cassette Specification Sheet
37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 Net/Gross Weight lbs. 15/24 15/24 15/24 15/24 15/24 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 16 37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 37 3/8 x 37 3/8 x 2 1/2 Net/Gross Weight lbs. 15/24 15/24 15/24 15/24 15/24 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 17: Recommended Tools For Installation
Sharp Plier Cable Ties Black Tape for Electrical Use Electrical Meter 4) Trial Running Units and Inspection Clamp Meter (Not Shown) Manifold Infra Thermometer (Not Shown) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 18: Installation Site Selection
Leave enough free space to allow access for routine maintenance. • Do not install in a laundry room or by a swimming pool due to chemicals corroding cassette coil. Models VRFI-12EC4-D2B(55)5 VRFI-18EC4-D2B(55)5 10.04 in. VRFI-24EC4-D2B(55)5 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 19: Connection Pipe Requirements
(like, YJV copper cable, consisting of PE insulated wires and a PVC cable jacket) used at 40°С) and resistible to 90°С) (see IEC 60364-5-52). If the working condition changes, they should be 194°F ( modified according to the related national standard. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 20: Indoor Unit Dimensions
9.45” 23.46” VRFI-18EC4-D2B(55)5 (670 mm) (666 mm) (600 mm) (496 mm) (145 mm) (240 (596 mm) 37.4” (33” 30.7” 26.76” 5.7” 9.45” VRFI-24EC4-D2B(55)5 (950 (780 (680 (145 mm) (240 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 21: Indoor Unit Installation
With a concrete drill, drill for 12.7mm (1/2”) diameter holes. (Fig.2) 3. Insert the anchor bolts into the drilled holes, and drive the pins completely into the anchor bolts with a hammer. (Fig.3) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 22: Indoor Unit Leveling
After bending the pipe to the desired shape, replace the insulation on the pipe, and secure it with tape. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 23 60-65 (N·m) 1/2˝(Inch) 45-50 (N·m) 3/4˝(Inch) 70-75 (N·m) 7/8˝(Inch) 80-85 (N·m) Examine the connection pipe for leaks, then perform the treatment of heat insulation, as shown in the illustration. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 24: Outdoor Pipe Connection
Heat Insulation on the Pipe Joints (Indoor Side Only) Stick coupler heat insulation (large and small) to the place where connecting pipes. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 25: Vacuum And Gas Leakage Inspection
Note that the gas and liquid valve can be opened fully only after the manifold valve assembly is removed. 8. Replace the caps of the liquid valve, gas valve, and service port. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 26 2. Keep pipe size equal to or greater than that of the connecting pipe. 3. Install the drain piping as shown and take measures to avoid condensation. Improperly rigged piping can lead to leaks and eventually wet furniture and belongings. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 27: Installing The Drain Piping
Therefore, a U-type water trap shall be designed on the drainage side of each indoor unit. 6. Install one water trap for each unit. 7. Installation of water trap shall consider easy cleaning in the future. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 28 4. Make sure the pipe has a downward gradient of 1/100 or more for the drain pipe. To accomplish this, mount supporting brackets at an interval of 3.25-5 ft (39-60 in.). YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 29: Panel Installation
Add approximately 1liter of water slowly into the drain pan and check drainage flow while the system is running in COOLING mode. Panel Installation Precautions 1. See the figure below for the relationship of the front panel and the pipe connection. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 30 3. If a gap still exists between ceiling and fascia panel after tightening the screws, readjust the height of the indoor unit. 4. Wire the swing flap as shown in the illustration below. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 31 4. Adjust the panel along the direction indicated by the arrow as shown in Fig.35. 5. Tighten the screws until the thickness of the sealing material between the panel and the indoor unit reduces to 3/16 in. (5-8mm). YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 32: Electrical Wiring
3) Using a round terminal fastener or pliers, securely clamp a round terminal to each stripped wire end. 4) Position the round terminal wire, replace and tighten the terminal screw with a screwdriver. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 33 Electric wiring between the indoor and outdoor units Single-phase units (12~24k) Electric wiring of indoor unit side Remove the electric box cover from the electric box sub-assembly and then connect the wire. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 34: Controller Installation
If you see an error code not listed, please contact qualified professionals for service. When the unit is connected to the wired controller, the error code will be simultaneously shown on it. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 35 2. When the wired controller is connected to the unit, the indoor unit display is disabled, and the unit won’t receive the remote control command. Point your remote at the wired controller instead of at the display of the unit. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 36 HVAC service technician. A qualified HVAC technician will be required to diagnose and service the system. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 37: Troubleshooting Prior To Contacting A Technician
Push the two fasteners to open the panel grille. 2. Disassemble the air inlet grille a. Open the air inlet grille at 45° angle, lift the pegs to remove the grille. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 38 Never dry filters near open flame. The plastic can warp or catch fire. 6. Replace the filter into the frame. The same as step 3 7. Re install the grille. The same as step 1 and 2 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 39: Remote Controller Yap1F
CLOCK Set Clock of the system T-OFF Set Timer Off function T-ON Set Timer On function Set left & right Swing status Set Fan speed Set Temperature and Time YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 40 NOTE: Left/Right SWING will operate continuously in 2 second cycles. Swing states will change accordingly to the sequence displayed above, or switch to CLOSED state and state. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 41 Health function is available if your unit is equipped with an ION generator. When health function is on, the ION generator will begin operation, adsorbing dust and killing the bacteria in the air. In unit on status, press button to set the health function. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 42 Press the T-ON button again to confirm the Timer On setting. “ON” will appear on the remote display next to the current time. d. To turn the Timer On function off, press the T-ON button. “ON” will no longer be displayed next to the current time. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 43 Place two new (AAA 1.5V) batteries into the remote. Make sure the battery poles (“+” and “-”) are in the correct positions (Fig 3). Reinstall the cover (Fig 4). YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 44 When replacing the batteries, do not use old or different types of batteries. This may cause the remote control to malfunction. • When the remote controller will not be in use for a long time, remove the batteries to avoid damage that can be caused by corrosion. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 45: User Notes And Installation/Service/Maintenance Notes
INSTALLATION NOTES Put down whatever questions you have or problems you have seen as a unit history: Did You Asked Your Contact YMGI Date Notes Technician for Technical Recommendations? Support? YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 46 Put down whatever questions you have or problems you have seen as a unit history: Technician Job Not Installation Company Name, Phone Checklist Date Performed by Technician Name, & HVAC License # Completed Technician Fully? YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 47 YMGI: Your Modern Green Idea SERVICE / MAINTENANCE NOTES Company Name, Phone, Date Contents of Service / Maintenance Technician Name & HVAC License # YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 48 YMGI: Your Modern Green Idea YMGI is dedicated to designing, manufacturing and distributing the highest quality, energy saving and environmentally friendly air conditioner and heat pump products, while providing the best service and support to all of our customers. Our mission is to help build a sustainable, efficient and green world.
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